WMAQ-TV, Channel 5, is the Chicago affiliate of NBC. The logo displayed on this particular button was in use from 1956-1975. WMAQ-TV was founded in 1948 as WMBQ, to avoid confusion with the local radio station, and has remained the local NBC station ever since. The station is notable for being the fourth overall station to become operational in Chicago, and for being one of the five original NBC Universal owned and operated television stations nationwide.